[AETHER-3277] Add documentation for System Tests

Change-Id: Ic0a0116a28255ae9c634da7e2169492da4d5666c
diff --git a/index.rst b/index.rst
index c73e54f..a5aedcb 100644
--- a/index.rst
+++ b/index.rst
@@ -105,6 +105,7 @@
 
    testing/about_system_tests
    testing/aether-roc-tests
+   testing/system-tests
    testing/acceptance_specification
 
 .. toctree::